Solution
Let $$x$$ is added to the each term of 4 : 7
According to the problem,
$$\frac{4+x}{7+x}=\frac{2}{3}$$
$$=$$> $$12+3x=14+2x$$
$$=$$> $$3x-2x=14-12$$
$$=$$> $$x=2$$
Hence, the correct answer is Option A
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